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def definition def or abbrev

valueOfLit

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formal statement (Lean)

  32def valueOfLit {n} (σ : PartialAssignment n) : Lit n → Option Bool
  33  | .pos v => σ v
  34  | .neg v => Option.map not (σ v)
  35
  36/-- Evaluate a clause under a partial assignment: returns `some b` if all literals
  37    are known, otherwise none. -/

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